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Weather by month

Saitama Weather by Month

Average temperatures, rainfall and humidity for Saitama, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Saitama month looks like before you travel — then check the live Saitama forecast for the days ahead.

Warmest month

August

32°C average high

Coolest month

January

2°C average low

Wettest month

June

164 mm of rain

Driest month

January

28 mm of rain

Average temperature and rainfall in Saitama by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	10°C	2°C	-13°C / 18°C	28 mm	54%	12 km/h
February	11°C	3°C	-4°C / 23°C	42 mm	56%	13 km/h
March	15°C	7°C	-3°C / 28°C	82 mm	61%	13 km/h
April	20°C	12°C	1°C / 29°C	107 mm	64%	13 km/h
May	24°C	16°C	8°C / 34°C	105 mm	66%	13 km/h
June	27°C	20°C	13°C / 38°C	164 mm	71%	10 km/h
July	31°C	24°C	18°C / 39°C	112 mm	72%	11 km/h
August	32°C	25°C	18°C / 41°C	126 mm	70%	12 km/h
September	28°C	22°C	14°C / 37°C	142 mm	74%	12 km/h
October	22°C	15°C	5°C / 32°C	125 mm	72%	11 km/h
November	17°C	10°C	-1°C / 27°C	58 mm	64%	11 km/h
December	12°C	4°C	-6°C / 23°C	33 mm	56%	11 km/h

Best time to visit Saitama

The most comfortable time to visit Saitama is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1,123 mm a year.

Travellers who prefer heat should aim for August, when highs average 32°C. June is the month to avoid if rain would spoil your plans — it averages 164 mm, roughly 6× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Saitama forecast for what is happening now.